I have a strong dislike for modern popular rappers. But I quite like Snoop Dogg's stuff, and some 2pac. On top of this, I love Rage Against The Machine and the older Linkin Park stuff. Also US3 and Fun Lovin' Criminals if anyone's heard of them? :3
Of course Eminem, too - yet imo his new stuff is pretty awful, with the exception of the song "Beautiful"
Most modern, popular rap is about drugs, alcohol, women and money, or being a thug - which I despise. But write that shit about something meaningful and throw in soem good music and it's great!